Bug type

Behavior bug (incorrect output/state without crash)

Summary

When opencode/minimax-m2.5 is set as the primary model, all tool calls are silently discarded. The agent never executes any tool, regardless of the request.

Steps to reproduce

1. Configure primary model as opencode/minimax-m2.5 in ~/.openclaw/openclaw.json:

   { "agents": { "defaults": { "model": { "primary": "opencode/minimax-m2.5" } } } }

2. Start a session and send a message that requires tool use (e.g., a web search or file read).
3. Observe that the agent replies without invoking any tool.

Expected behavior

Tool calls issued by the model are parsed and executed; results are returned to the model and a final reply is produced.

Actual behavior

No tools are executed. The agent replies as if tools do not exist.

Root cause (code-level)

MiniMax M2.5 does not emit standard tool_use blocks. Instead it embeds tool invocations as XML in text content:

<minimax:tool_call>
<invoke name="some_tool">...</invoke>
</minimax:tool_call>

stripMinimaxToolCallXml() in src/agents/pi-embedded-utils.ts removes this XML from the text — but never parses or dispatches it as a tool execution. The invocation is silently dropped.

Relevant code:

• src/agents/pi-embedded-utils.ts — stripMinimaxToolCallXml() + extractAssistantText()
• src/agents/opencode-zen-models.ts:99 — MiniMax routed to anthropic-messages API, but format does not conform

OpenClaw version

2026.3.9 (5decb00)

Operating system

macOS 25.3.0

Install method

pnpm dev

Impact and severity

Affected: All users with opencode/minimax-m2.5 as primary model
Severity: High — tools are completely non-functional with this model
Frequency: 100% repro
Consequence: Agent cannot use any tools; renders the model effectively useless for agentic tasks

Additional information

Workaround: switch primary model to one with proper tool_use support, e.g.:

openclaw config set agents.defaults.model.primary opencode/claude-opus-4-6

Fix direction: parse <invoke name="...">...</invoke> XML in MiniMax output and dispatch as structured tool calls, rather than stripping. Requires changes in pi-embedded-utils.ts and pi-embedded-subscribe.handlers.ts.